You could move all the babies into a fry net breeder or move all of the bigger fish (also the parents) to a different tank to avoid the babies getting eaten.
1	You	you	PRON	PRP	Case=Nom|Person=2|PronType=Prs	3	nsubj	3:nsubj|13:nsubj	_
2	could	could	AUX	MD	VerbForm=Fin	3	aux	3:aux	_
3	move	move	VERB	VB	VerbForm=Inf	0	root	0:root	_
4	all	all	DET	PDT	_	6	det:predet	6:det:predet	_
5	the	the	DET	DT	Definite=Def|PronType=Art	6	det	6:det	_
6	babies	baby	NOUN	NNS	Number=Plur	3	obj	3:obj	_
7	into	into	ADP	IN	_	11	case	11:case	_
8	a	a	DET	DT	Definite=Ind|PronType=Art	11	det	11:det	_
9	fry	fry	NOUN	NN	Number=Sing	10	compound	10:compound	_
10	net	net	NOUN	NN	Number=Sing	11	compound	11:compound	_
11	breeder	breeder	NOUN	NN	Number=Sing	3	obl	3:obl:into	_
12	or	or	CCONJ	CC	_	13	cc	13:cc	_
13	move	move	VERB	VB	VerbForm=Inf	3	conj	3:conj:or	_
14	all	all	DET	DT	_	13	obj	13:obj	_
15	of	of	ADP	IN	_	18	case	18:case	_
16	the	the	DET	DT	Definite=Def|PronType=Art	18	det	18:det	_
17	bigger	big	ADJ	JJR	Degree=Cmp	18	amod	18:amod	_
18	fish	fish	NOUN	NN	Number=Sing	14	nmod	14:nmod:of	_
19	(	(	PUNCT	-LRB-	_	18	punct	18:punct	SpaceAfter=No
20	also	also	ADV	RB	_	22	advmod	22:advmod	_
21	the	the	DET	DT	Definite=Def|PronType=Art	22	det	22:det	_
22	parents	parent	NOUN	NNS	Number=Plur	18	appos	18:appos	SpaceAfter=No
23	)	)	PUNCT	-RRB-	_	18	punct	18:punct	_
24	to	to	ADP	IN	_	27	case	27:case	_
25	a	a	DET	DT	Definite=Ind|PronType=Art	27	det	27:det	_
26	different	different	ADJ	JJ	Degree=Pos	27	amod	27:amod	_
27	tank	tank	NOUN	NN	Number=Sing	13	obl	13:obl:to	_
28	to	to	PART	TO	_	29	mark	29:mark	_
29	avoid	avoid	VERB	VB	VerbForm=Inf	13	advcl	13:advcl:to	_
30	the	the	DET	DT	Definite=Def|PronType=Art	31	det	31:det	_
31	babies	baby	NOUN	NNS	Number=Plur	33	nsubj:pass	33:nsubj:pass	_
32	getting	get	AUX	VBG	VerbForm=Ger	33	aux:pass	33:aux:pass	_
33	eaten	eat	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	29	ccomp	29:ccomp	SpaceAfter=No
34	.	.	PUNCT	.	_	3	punct	3:punct	_
